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fs: Add helper to clean bdev aliases under a bh and use it

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Add a helper function that clears buffer heads from a block device
aliasing passed bh. Use this helper function from filesystems instead of
the original unmap_underlying_metadata() to save some boiler plate code
and also have a better name for the functionalily since it is not
unmapping anything for a *long* time.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Jan Kara 2016-11-04 18:08:15 +01:00 • committed by Jens Axboe
parent 69a9bea146
commit e64855c6cf
10 changed files with 16 additions and 19 deletions
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4
include/linux/buffer_head.h
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@ -171,6 +171,10 @@ int sync_mapping_buffers(struct address_space *mapping);
void unmap_underlying_metadata(struct block_device *bdev, sector_t block);
void clean_bdev_aliases(struct block_device *bdev, sector_t block,
sector_t len);
static inline void clean_bdev_bh_alias(struct buffer_head *bh)
{
clean_bdev_aliases(bh->b_bdev, bh->b_blocknr, 1);
}
void mark_buffer_async_write(struct buffer_head *bh);
void __wait_on_buffer(struct buffer_head *);